From 85d915ce08f83d640afabbb50558d8a1c0c9a49c Mon Sep 17 00:00:00 2001
From: "coadde [Márcio Alexandre Silva Delgado]" <coadde@parabola.nu>
Date: Thu, 28 Aug 2014 00:17:28 -0300
Subject: move [libre]/grub-legacy to [pcr]

---
 pcr/grub-legacy/intelmac.patch | 67 ++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 67 insertions(+)
 create mode 100644 pcr/grub-legacy/intelmac.patch

(limited to 'pcr/grub-legacy/intelmac.patch')

diff --git a/pcr/grub-legacy/intelmac.patch b/pcr/grub-legacy/intelmac.patch
new file mode 100644
index 000000000..a3fabc733
--- /dev/null
+++ b/pcr/grub-legacy/intelmac.patch
@@ -0,0 +1,67 @@
+--- grub-0.97.orig/stage2/asm.S	2004-06-19 18:55:22.000000000 +0200
++++ grub-0.97/stage2/asm.S	2006-04-21 11:10:52.000000000 +0200
+@@ -1651,7 +1651,29 @@
+ 	jnz	3f
+ 	ret
+ 
+-3:	/* use keyboard controller */
++3:	/*
++	 * try to switch gateA20 using PORT92, the "Fast A20 and Init"
++	 * register
++	*/
++	mov $0x92, %dx
++	inb %dx, %al
++	/* skip the port92 code if it's unimplemented (read returns 0xff) */
++	cmpb $0xff, %al
++	jz 6f
++	
++	/* set or clear bit1, the ALT_A20_GATE bit */
++	movb 4(%esp), %ah
++	testb %ah, %ah
++	jz 4f
++	orb $2, %al
++	jmp 5f
++4:	and $0xfd, %al
++	
++	/* clear the INIT_NOW bit don't accidently reset the machine */
++5:	and $0xfe, %al
++	outb %al, %dx
++	
++6:	/* use keyboard controller */
+ 	pushl	%eax
+ 
+ 	call    gloop1
+@@ -1661,9 +1683,12 @@
+ 
+ gloopint1:
+ 	inb	$K_STATUS
++	cmpb	$0xff, %al
++	jz	gloopint1_done
+ 	andb	$K_IBUF_FUL, %al
+ 	jnz	gloopint1
+ 
++gloopint1_done:	
+ 	movb	$KB_OUTPUT_MASK, %al
+ 	cmpb	$0, 0x8(%esp)
+ 	jz	gdoit
+@@ -1684,6 +1709,8 @@
+ 
+ gloop1:
+ 	inb	$K_STATUS
++	cmpb	$0xff, %al
++	jz	gloop2ret
+ 	andb	$K_IBUF_FUL, %al
+ 	jnz	gloop1
+ 
+@@ -1991,6 +2018,11 @@
+ ENTRY(console_getkey)
+ 	push	%ebp
+ 
++wait_for_key:
++	call	EXT_C(console_checkkey)
++	incl	%eax
++	jz	wait_for_key
++	
+ 	call	EXT_C(prot_to_real)
+ 	.code16
+  
-- 
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